Hydrothermal Syntheses, Crystal Structures, and Photoluminescent Properties of Two Entangled Complexes with Rigid Bis(imidazolyl) Ligands

Two new entangled complexes, namely, [Zn(bibp)(L 1 )] ( 1 ) and [Co(bib)(L 2 )] · H 2 O ( 2 ) [bibp = 4,4′‐bis(1‐imidazolyl)biphenyl, bib = 1,4‐bis(1‐imidazolyl)‐benzene, H 2 L 1 = 4,4′‐oxydibenzoic acid and H 2 L 2 = 4,4′‐(2,2′‐oxybis(ethane‐2,1‐diyl)bis(oxy))dibenzoic acid] were synthesized hydrothermally and characterized by IR spectroscopy, elemental analyses, and single crystal X‐ray diffraction techniques. Complex 1 presents a uninodal 4‐connected dmp net with fivefold interpenetration containing left‐ and right‐handed single‐helical (ZnL 1 ) n chains. Complex 2 displays both polyrotaxane and polycatenane characteristics. Furthermore, thermogravimetric studies of 1 and 2 and photoluminescent property of 1 were also investigated.